Burglar-alarm lock.



L-BALTES.

BURGLAR ALARM LOCK.

APPLICATION FILED FEB-12,19l4. 1,139,152.. Patented May 11, 1915.

R y 0 8 E Mm M J ma m WITNESSES /%ww% THE NORRIS PETERS 60.. PHOTO-LITHO.. WASHING TON. D. C.

JOHN BALTES, on NEW YORK, n. Y.

BURGLAR-ALARM LOCK.

Specification of Letters Patent.

Patented May 11, 1915.

Application filed February 12, 1914. Serial No. 818,347.

To all whom it may concern Be it known that I, JOHN BALTES, a citizen ofthe United States, residing at New York, in the county of New York andState of New York, have invented new and useful Improvements inBurglar-Alarm Locks, of which the following is a specification.

My invention relates to looks, which have incorporated therein a burglaralarm device so arranged that the lock may be actuated by the use of akey on the outside, or by the knob on the inside, but if tampered withby persons of malicious intent the effect of withdrawing the bolt byforcible means will be to actuate an alarm thereby giving warning to theproper parties that the lock is being tampered with.

Referring to the drawings annexed hereto and forming a part of thisspecification:Figure 1 is a rear elevational view of a lock constructedaccording to my invention, with the bottom plate removed and showing thedevice in the set position. Fig. 2 is a rear elevational view of thelock shown in Fig. 1 but showing the lock in the opened position. Fig. 3is a sectional elevational taken on the line 3-3 of Fig. 2.

Referring to the drawing, the casing 1 is suitably secured tothe baseplate 2' which is screwed or otherwise fastened to the door 3 andcarries a key engaging member 4 extending through the door 3. The casing1 also carries a. knob 55, said knob or a key inserted in the keyengaging member 4 being adapted to actuate a disk member 6 carrying theextending lugs 7 and 8 respectively, said lugs being adapted to actuatethe locking bolt and also to engage the spring 30. The casing 1 hasmounted therein a sliding bolt 9 suitably actuated by means of thesprings 10 carried on the legs 11 thereof, the said legs being guided inthe partition 12 carried by the casing 1. The casing 1 has pivotallymounted thereon a lever 13 secured by the pin 14 mounted in the casing1, the lever 13 carrying at the inner end two lugs 13 adapted to receivetherebetween the lugs 7 of the disk 6 which also engage under the edgeof one of the heads 15 of the legs 11 carrying the bolt 9 and serving,when the knob 5 or key is turned, to draw the bolt 9 and move the lever13. Between the lever 13 and the casing 1 is mounted a second lever 16having at one end a hook 17 and at the other end a slot 18, said slotengaging a pin 19 carried by the lever 13 so that when the knob or keyis turned the lug 7 will engage with the bolt 9 and lever 13 therebydrawing the bolt 9 and, at the same time, moving the lever 13 which inturn actuates the hook l7 swinging it out of its normal position.

Mounted on the door post and adapted to receive the bolt 9 and hook 17is a casing 20, forming a socket for the bolt. lVithin the casing orsocket 20 is mounted the insulating material 21 which carries thereonthe space terminal poles 22 and 23, respectively, the pole 22 carryingan arm 2% having a sleeve 25 fitting thereon and is adapted to bestretched toward the pole 23 by means of the spring 26 carried thereby.The two poles 22 and 23 are connected in circuit with a bell or otherdevice adapted to give an alarm, but not illustrated in the drawing.

Mounted within the socket 20, on the side wall thereof, is the slidingmember 27 engaging the guiding pin 28, said sliding member 27 carryingat one end an offset arm 29 adapted to be interposed between the end ofthe sleeve 25 and the pole 23 to prevent electrical connectiontherebetween when the various parts of the lock are in the positionshown in Fig. 1, this being the position in which the bolt is set orlocked. The sliding member 27 carries at its upper end a projecting arm31 adapted to be engaged by the hook member 17 when the various partsare in the position shown in Fig. 1. It will be seen that if the knob orthe key engaging member are turned the bolt will be witl drawn and thehook 17 would engage the arm 31 if means were not provided by firstmoving it out from under the arm 31. However, when the knob or key isturned the lever 13 acts to swing the hook 17 out from under the arm 31and allows the bolt and hook to be withdrawn into the casing 1 withoutdisturbing the position of the sliding member 27. On the other hand, ifpersons with malicious intent attempt to actuate the bolt 9 by means ofa screw driver or other means, the hook 17 will engage the arm 31 anddraw the sliding member 27 out from between the two poles allowing thespring 26 to act and thrust the end of the sleeve 25 against the pole 23thereby causing electrical connection and sounding an alarm.

It will be understood that various modifications from the preciseconstruction and arrangement of parts illustrated and described hereinmay be resorted to in the practical construction of a lock according tomy invention.

Having thus described my invention,what I claim is 1. The combination inan alarm lock, of a bolt, in combination with a socket, two electricalterminal poles in said socket and adapted to contact with each other, asliding member in said socket and adapted to normally remain in setposition, holding said terminal poles out of contact, and ahook memberadapted when said bolt is forcibly released to draw said sliding member,thereby establishing an electrical connection between said terminalpoles.

2. The combination in an alarm lock, of a bolt, in combination with asocket, two electrical poles in said socket insulated from said bolt andsocket and adapted to contact with each other, a sliding member in saidsocket adapted to normally remain in a set position holding saidterminal poles out of contact, a hook member adapted when said bolt isforcibly released to draw said sliding member thereby establishing anelectrical connection between said terminal poles, and means foractuating said bolt from within or without, without establishing contactbetween said terminal poles.

3. The combination in an alarm lock, of a sliding bolt in combinationwith a socket, two electrical terminal poles in said socket and adaptedto contact with each other, a sliding member in said socket and adaptedto normally remain in a set position holding said terminal poles out ofcontact, a hook member adapted when said bolt is forcibly released todraw said sliding member thereby establishing an electrical connectionbetween said terminal poles, and a revolving disk adapted to actuatesaid bolt member and said sliding member.

4. The combination in an alarm lock, of a bolt in combination with asocket, two electrical poles in said socket and adapted to contact witheach other, a sliding member in said socket and adapted to normally remain in a set position holding said terminal poles out of contact, ahook member adapted when said bolt is forcibly released to draw saidsliding member thereby establishing an electrical connection betweensaid terminal poles, a revolving disk adapted to actuate said bolt andsliding member, and means for revolving said disk from within orwithout, without establishing contact between said poles.

5. The combination in an alarm lock, of a sliding bolt in combinationwith a socket, two electrical terminal poles in said socket and adaptedto contact with each other, a sliding member in said socket adapted tonormally remain in a'set position holding said terminal poles out ofcontact, a toggle member having a hook at one end thereof adapted whensaid bolt is forcibly released to draw said sliding member therebyestablishing an electrical connection between said terminal poles, arevolving disk adapted to actuate said poles, and means for actuatingsaid disk and bolt from within or without, without establishingelectrical contact between said poles.

In testimony whereof I afiix my signature in the presence of twowitnesses.

JOHN BALTES.

Witnesses ALANDAR HAMBURGER, ALEXANDER DnNns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G.

